Phylogenetic tree of HOXA13 and HOXD13. The evolutionary history was inferred using the Neighbor-Joining method [56]. The bootstrap consensus tree inferred from 1000 replicates is taken to represent
the evolutionary history of the taxa analyzed [57]. Branches corresponding to partitions reproduced in less than 50% bootstrap replicates
were collapsed. The percentage of replicate trees in which the associated taxa clustered
together in the bootstrap test (1000 replicates) are shown next to the branches [57]. The evolutionary distances were computed using the Poisson correction method [37] and are in the units of the number of amino acid substitutions per site. The analysis
involved 24 amino acid sequences with a total of 114 positions in the final dataset.
All positions containing gaps and missing data were eliminated. Evolutionary analyses
were conducted in MEGA5 [37].